Sciweavers

405 search results - page 34 / 81
» Semantic Assumptions and Query Evaluation in Temporal Databa...
Sort
View
VLDB
2007
ACM
109views Database» more  VLDB 2007»
16 years 1 days ago
FluxCapacitor: Efficient Time-Travel Text Search
An increasing number of temporally versioned text collections is available today with Web archives being a prime example. Search on such collections, however, is often not satisfa...
Klaus Berberich, Srikanta J. Bedathur, Thomas Neum...
SIGMOD
2007
ACM
160views Database» more  SIGMOD 2007»
15 years 12 months ago
Supporting ranking and clustering as generalized order-by and group-by
The Boolean semantics of SQL queries cannot adequately capture the "fuzzy" preferences and "soft" criteria required in non-traditional data retrieval applicati...
Chengkai Li, Min Wang, Lipyeow Lim, Haixun Wang, K...
PODS
2007
ACM
131views Database» more  PODS 2007»
15 years 12 months ago
Provenance semirings
We show that relational algebra calculations for incomplete databases, probabilistic databases, bag semantics and whyprovenance are particular cases of the same general algorithms...
Todd J. Green, Gregory Karvounarakis, Val Tannen
MOBIDE
2003
ACM
15 years 5 months ago
TiNA: a scheme for temporal coherency-aware in-network aggregation
This paper presents TiNA, a scheme for minimizing energy consumption in sensor networks by exploiting end-user tolerance to temporal coherency. TiNA utilizes temporal coherency to...
Mohamed A. Sharaf, Jonathan Beaver, Alexandros Lab...
DASFAA
2009
IEEE
173views Database» more  DASFAA 2009»
15 years 3 months ago
A Uniform Framework for Ad-Hoc Indexes to Answer Reachability Queries on Large Graphs
Graph-structured databases and related problems such as reachability query processing have been increasingly relevant to many applications such as XML databases, biological databas...
Linhong Zhu, Byron Choi, Bingsheng He, Jeffrey Xu ...